A detection method and related device for foreign matter in a cover glass module

Abstract

The present application discloses a method for detecting foreign objects in a cover glass module and a related device, which are used to improve the detection accuracy of foreign objects in the cover glass module. The method of the present application includes: setting a camera, a cover glass module, and a light source; turning on the second light source to take pictures of the cover glass module; turning on the first light source to take pictures of the cover glass module; performing median filtering on images I0, I1 and I2; Image IF0, image IF1, and image IF2 are subjected to gray-scale morphological bottom-hat transformation and binarization processing; image I1 and image I2 are respectively subjected to gray-scale morphological top-hat transformation and binarization processing; Perform OR, AND processing, and morphological reconstruction of the four foreign object images, the second foreign object image, and the third foreign object image; perform OR, AND processing, and size selection on the first foreign object image, image IF1, second foreign object image, and image IF2 Processing and morphological reconstruction; generation of OCA dissection foreign body images and screening detection.

Description

technical field [0001] The present application relates to the field of display screens, in particular to a method for detecting foreign matter in a cover glass module and a related device. Background technique [0002] In the field of display screens, there is a structure CG that exists in LCD displays and OLED liquid crystal displays. The full name is Cover Glass, also known as cover glass. The cover glass is attached above the LCD display screen and the OLED liquid crystal display screen to protect the display screen. Before the cover glass is laminated, a layer of cover glass protective film will be attached to the upper surface of the cover glass with electrostatic force, and a layer of OCA optical adhesive layer will be attached to the lower surface of the cover glass. There is a layer of heavy film under the OCA optical adhesive layer. To protect the OCA optical adhesive layer from secondary pollution by the environment. When it needs to be attached, the heavy film u...

AI Technical Summary

Problems solved by technology

However, the presence of foreign matter will bring greater optical interference to the detection of foreign matter in the OCA optical adhesive layer. The shape of foreign matter itself is diverse, and the thickness of each film layer in the cover glass module is not large (the total thickness is usually <1mm). Effective foreign object layered identification is difficult

This makes the foreign matter detection device unable to effectively distinguish the foreign matter on the OCA optical adhesive layer from the foreign matter of other film layers, resulting in a decrease in the accuracy of foreign matter detection on the cover glass module

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